States (prior to 1861) that were considered “Northern” but are not included in this table are Kansas, Nebraska, and Nevada. As of 1860, Kansas had 2 slaves, Nebraska had 15 slaves, and Nevada had none (represented as “N/A”).

Compare with the number of slaves in the Southern States for the same period of time by opening this link and placing the browser windows side-by-side to show the two different posts.